I put this in the Modern Gaming section of the forum because I don't remember this being much an issue with older games, and because it happened to me recently with a modern game, Genji: Dawn of the Samurai, but it's a general question. It doesn't really matter if it's happened with a modern or older game.
Like I said, I was playing Genji: Dawn of the Samuai recently, and I started seeing things unfolding in the story that lead me to believe that it was about to conclude soon. I'd also gone through several boss battles in the hours I'd played it without so much as even a scratch from any of them. This made me shelf the game for a few days because I completely lost interest. I couldn't believe that all I had to do was use Benkei (or whatever the 7' monk's name is) and simply tap the triangle button to eliminate EVERY CLUSTER OF ENEMIES IN THE ENTIRE GAME, WITH ONE BUTTON PRESS.
Even bosses didn't stand a chance against the guy. I also noticed that the two playable characters shared the same experience points as well, so when you level up a character though experience, you level up both. There's a secondary level system that uses collected chips which allow you to upgrade character stats independently, but still.
Am I alone here, or do any of you lose interest and shelf a game if you totally fly through it with minimal effort?